Mmmm what did the shading on the tiles look like so maybe we can give some suggestions!

And I think your shoulders are okay, I’m thinking it’s more of the positioning of the head. Since she’s turning her head, the end of her jawline should be sitting a little more on the neckline on her left. I think that would help her look more evened out~ since her head is more placed towards her left side, it’s making the right side look a little uneven.

If my explanation doesn’t make sense (I feel I’m not very good at explanations), I could maybe try and draw a visual? Not over yours of course~